Sorry for the late reply. Only just noticed it
Thanks I was trying to go for something familiar (a handful of basic "elements"), but for something I've not really seen done much in conworlds/constructed mythologies that use that sort of system. I wanted it tied in with how the universe works, it's history, and how it affects humanity, not just something that makes up the universe in a vague sort of way.
I wouldn't be surprised if some sort of "alchemy" could be built around this, given the existence of belief-driven "magic" on Yantas.